Season 4
21 episodes
44 min. per episode
Where to watch
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In a city of shadows, a brilliant investigator battles personal demons while uncovering chilling truths behind each murder.
Episodes
A sensational murder at the Statue of Liberty puts detectives on the trail of a killer who may be targeting the witnesses of another unsolved murder from Bonasera's past.
The discovery of the bodies of two scuba instructors leads investigators to uncover a plot to detonate a bomb in Lower Manhattan.
A murder case, burglary, and cyber-theft are all tied to a high-tech "spy-mobile." Mac gets more strange calls and messages, while a mystery person begins sending packages to Stella.
The death of a scientist is connected to a time machine he allegedly created, while the death of a co-ed at a diner is connected to a drug study at her school and an initiation ceremony.
A murder victim bears a striking resemblance to a well-known avatar in the online role-playing game "Second Life." Mac is forced to enter the game himself to solve the mystery surrounding her death.
Second CSI spin off which follows the Crime Scene Investigator's (CSI's) of the New York Police Department (NYPD) as they use advanced forensic science to reveal the circumstances behind mysterious and unusual deaths in New York City.